Internet-Based Multimodal Pain Program With Telephone Support for Adults With Chronic Temporomandibular Disorder Pain: Randomized Controlled Pilot Trial

Julia Lam, Peter Svensson, Per Alstergren, Julia Lam, Peter Svensson, Per Alstergren

Abstract

Background: Chronic pain from temporomandibular disorders remains an undertreated condition with debate regarding the most effective treatment modalities.

Objective: The aim of the study was to investigate the treatment effect of an internet-based multimodal pain program on chronic temporomandibular disorder pain and evaluate the feasibility of a larger randomized controlled trial.

Methods: An unblinded randomized controlled pilot trial was conducted with 43 participants (34 females, 9 males; median age 27, IQR 23-37 years) with chronic temporomandibular pain. Participants were recruited within the Public Dental Health Service and randomized to intervention (n=20) or active control (n=23). The intervention comprised a dentist-assisted internet-based multimodal pain program with 7 modules based on cognitive behavior therapy and self-management principles. The control group received conventional occlusal splint therapy. Primary outcomes included characteristic pain intensity, pain-related disability, and jaw functional limitation. Secondary outcomes were depression, anxiety, catastrophizing, and stress. Outcomes were self-assessed through questionnaires sent by mail at 3 and 6 months after treatment start. Feasibility evaluation included testing the study protocol and estimation of recruitment and attrition rates in the current research setting.

Results: Only 49% of participants (21/43) provided data at the 6-month follow-up (internet-based multimodal pain program: n=7; control: n=14). Of the 20 participants randomized to the internet-based multimodal pain program, 14 started treatment and 8 completed all 7 modules of the program. Between-group analysis showed no significant difference for any outcome measure at 3- or 6-month follow-up-characteristic pain intensity (3 months: P=.58; 6 months: P=.41), pain-related disability (3 months: P=.51; 6 months: P=.12), jaw functional limitation (3 months: P=.45; 6 months: P=.90), degree of depression (3 months: P=.64; 6 months: P=.65), anxiety (3 months: P=.93; 6 months: P=.31), stress (3 months: P=.66; 6 months: P=.74), or catastrophizing (3 months: P=.86; 6 months: P=.85). Within-group analysis in the internet-based multimodal pain program group showed a significant reduction in jaw functional limitation score at the 6-month follow-up compared to baseline (Friedman: χ2=10.2, P=.04; Wilcoxon: z=-2.3, P=.02). In the occlusal splint group, jaw function limitation was also reduced at the 6-month follow-up (Friedman: χ2=20.0, P=.045; Wilcoxon: z=-2.3, P=.02), and there was a reduction in characteristic pain intensity at the 3- and 6-month follow-up (Friedman: χ2=25.1, P=.01; Wilcoxon 3 months: z=-3.0, P=.003; Wilcoxon 6 months: z=-3.3, P=.001).

Conclusions: This study was not able to demonstrate a difference in treatment outcome between an internet-based multimodal pain program and occlusal splint therapy in patients with chronic temporomandibular pain. However, the findings suggested that the internet-based multimodal pain program improves jaw function. The results also confirmed the treatment effect of occlusal splint therapy for chronic temporomandibular pain. Furthermore, because of the high attrition rate, this pilot study showed that a randomized controlled trial with this design is not feasible.

Trial registration: ClinicalTrials.gov NCT04363762; https://ichgcp.net/clinical-trials-registry/NCT04363762.

Keywords: chronic pain; cognitive behavior therapy; combined modality therapy; facial pain; feasibility studies; health services research; internet-based intervention; occlusal splints; pilot projects; temporomandibular disorders.

Conflict of interest statement

Conflicts of Interest: The Faculty of Odontology, Malmö University, Sweden may have a financial interest in the internet-based multimodal pain program, as the internet-based multimodal pain program may be licensed from us to other Swedish Dental Service organizations and specialist clinics.

©Julia Lam, Peter Svensson, Per Alstergren. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 13.10.2020.

Figures

Figure 1
Figure 1
Screenshots from the guided internet-based multimodal pain program (top left: start page; top right: a page with a jaw exercises instructional video; lower left: a page with the recurrent rating of pain frequency, stress level, and life satisfaction to keep track of progression; lower right: an overview of treatment progression).
Figure 2
Figure 2
Flow diagram of the unblinded, parallel-arm, pilot randomized trial. iMPP: internet-based multimodal pain program; MRI: magnetic resonance imaging.
Figure 3
Figure 3
Attrition (left: the proportion of patients remaining in each treatment arm by event; right: an enlarged view of the proportion of internet-based multimodal pain program patients remaining by treatment module). iMPP: internet-based multimodal pain program; MRI: magnetic resonance imaging of the brain.

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